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Hardware Installation and Reference Guide Maintenance and Troubleshooting
4 Maintenance and Troubleshooting
4.1 General Troubleshooting Procedure
4.2 Common Faults
Symptom
Possible Causes
Solution
The PWR indicator is
not on after the switch
is started.
The power supply module does not
supply power.
The power cable is in loose contact.
Check whether the power socket at the equipment
room is normal and whether the power cable of the
switch is in good contact.
The RJ45 port is not in
connectivity or it is
erroneous in
receiving/transmitting
frames.
The connected twisted pair cable is
faulty.
The length of the cable exceeds 100 m.
The port has special configuration that
has no common working mode with the
connected switch.
Replace the twisted pair cable.
Check that the port configuration has the common
working mode with the connected switch.
The fiber port cannot
be connected.
The Rx and Tx ends are connected
reversely.
Switch the Rx and Tx ends of the optical fiber.
Replace the optical module with one of the